When I was at Uni, two feminists did just that - walked into Holme courtyard and took their t-shirts off. They had the word 'SLUT' written across their chest, so they claimed it was a 'reclamation of the word for the women's movement'.

So foregoing a t-shirt may not offend anybody, certainly not leftists. The right-wingers - the blokes, anyway - will happily participate in the 'continued objectification of the female form' by ogling and leering. Patriarchy, ahoy!